What is the unknown isotope in the following fission reaction: (mathrm{n}+{ }^{235} mathrm{U} ightarrow{ }^{131} mathrm{I}+)

What is the unknown isotope in the following fission reaction: \(\mathrm{n}+{ }^{235} \mathrm{U} \rightarrow{ }^{131} \mathrm{I}+\) ? + \(3 \mathrm{n}\)

A. \({ }^{86} \mathrm{Rb}\)

B. \({ }^{102} \mathrm{Rb}\)

C. \({ }^{89} \mathrm{Y}\)

D. \({ }^{102} \mathrm{Y}\)